Follow Yahoo News

About 40 protesters from across the country converge on Gilead Sciences headquarters in Foster City, Calif., on Wednesday, Nov. 14, 2012, calling on the drug maker to lower prices for its Stribild AIDS medication. Joined by an 18-wheel tractor trailer adorned with a "Stop Corporate Welfare for Gilead" sign, picketers marched through streets around the company's headquarters for about an hour. (Noah Berger /AP Images for AIDS Healthcare Foundation)

About 40 protesters from across the country converge on Gilead Sciences headquarters in Foster City, Calif., on Wednesday, Nov. 14, 2012, calling on the drug maker to lower prices for its Stribild AIDS medication. Joined by an 18-wheel tractor trailer adorned with a "Stop Corporate Welfare for Gilead" sign, picketers marched through streets around the company's headquarters for about an hour. (Noah Berger /AP Images for AIDS Healthcare Foundation)